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I saw some "creative" A-coil installs where coil was sitting on two pieces of 2x4 wood studs over the gas fired heat exchanger. The wood was right on heat exchanger and was badly burned. I hope that they did better then that, but sometimes techs forget or drop things inside the furnace.

I saw some "creative" A-coil installs where coil was sitting on two pieces of 2x4 wood studs over the gas fired heat exchanger. The wood was right on heat exchanger and was badly burned. I hope that they did better then that, but sometimes techs forget or drop things inside the furnace.

Agree...I happen to see that on the field too.Sometimes even we are on a very pressing pressure on service calls,we need to make sure we are not leaving unnecessary items inside units we serviced.